Made with the same vegetable oils used to formulate oil colors — namely linseed, safflower, and poppy — drying oils are used to modify the consistency and drying time of oil paints in much the same way as prepared mediums.

Cold Pressed Linseed Oil
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Winsor & NewtonCold Pressed Linseed Oil is a slightly yellow oil that is extracted without the use of heat. Add it to colors to reduce their consistency, improve flow, and increase gloss and transparency, while reducing brush marks. Cold Pressed Linseed Oil dries slightly quicker than Winsor & Newton Refined Linseed Oil and may exhibit better flow with some colors.